/Engine/Source/Runtime/Engine/Public/MeshMaterialShaderType.h
static bool ShouldCompileVertexFactoryPermutation ( EShaderPlatform Platform, const [FMaterialShaderParameters](API\Runtime\Engine\FMaterialShaderParameters) & MaterialParameters, const [FVertexFactoryType](API\Runtime\RenderCore\FVertexFactoryType) * VertexFactoryType, const [FShaderType](API\Runtime\RenderCore\FShaderType) * ShaderType, EShaderPermutationFlags Flags )